Speed-governor



(Model.)

'P. WELLS.

SPEED GOVERNOR.

No. 271,287. Patented Jan.30r.fl883.

N. Pneus, Pham-umugmpm. wmngwn, mc.

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UNITED STATES PATENT @Erica PARKER VELLS, OF LYNN, MASSACHUSETTS.

SPEED-GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 271,287, 'dated January 30, 1883.

' Application e1edJuiya4,1es2. (Model.)

zen ofthe United States, residing at Lynn,

State of Massachusetts, have invented certain new and useful Improvements in Speed-Governors; and 1 do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures ot' reference marked thereon, which form a part of this specification.

My invention relates to speed and feed governors or regulators for steam-engines, the device being specially adapted for service upon stationary marine engines and the like; and thenovelty consists in the construction and arrangement of parts, as will be more fully hereinafter set forth, and specifically pointed ont in the claims.

The object of the invention is to provide a steamgovernor which shall beoperated bythe engine the speed of which it regulates, which shall be simple and cheap of construction, not liable to get out of order, and which shall be efficient in service; and to this end the invention consistsinthemcchanismsfullyillustrated in the accompanying drawings, which form a part of this specification, and in which- Figure l is a side elevation, partly broken away to show the ports; and Fig. 2, a crosssection taken through the lines x x ot' Fig.

Referring to the drawings, in which similar letters of reference indicate like parts in both the gures, A represents a vertical revolving shaft having a threaded upper end, a, and upon its lower extremity a rigid beveled gear, a', which meshes with a similar gear, A', rigid upon a horizontal shaft carrying a pulley, a2. rlhe shaft A revolves in a cylinder or sleeve, B, rigid with a proper stationary frame, B', and the pulley c2 upon the horizontal shaft receives its motion from the engine, over which the device as a governor exercises control.

Secured at its center to the vertical shaft A is a curved bar, C, having near either extremity rigid rods c, upon which are loosely hung the balls D, which are pivoted at d to the vokes E,which are in turn pivoted to the sleeve F, having annular recess fl The rods c are arranged at an approximate angle of forty-five degrees from a vertical plane, and suiiicient .space is left in the yoke E to allow the balls D to ride up this incline as they are centrifugally forced in that direction.

A curved spring, R, has a central perforation',which receives the threaded end a ofthe vertical shaft A, and oblong perforations near each ot' its extremities receive the rodsc as they project above the balls D. A nut, 130perating upon the portion a, allows the operator to give the spring R more or less resisting force to the balls against the centrifugal force at will, the purpose of which will be hereinafter explained.

In the annular recess j operaties a fork, g, which is rigid with an arm, G, loosely secured to a crank-lever, H, which is rigid with a cylindrical valve-frame, I, having .longitudinal slots t, which frame I oscillates freely in a port-cylinderK,havingsimilarandl corresponding longitudinal ports, k. This port-cylinder K is inclosed in a strongsteam-tight cylinder, L, of such greater capacity as to allow an intervening steam'chamher upon all sides, and the cylinder or case L has an inlet, L', for steam from the boiler, and an outlet for steam leading through ports m and through the pipe M to the steam-chest or piston-cylinder.

The conformation of the valve-cylinder I 'i and the port-cylinder K L are similar, and when the exigirle is at rest the ports in each correspond, thc sleeve F and balls D being at their lowest gravital point. When, however, the engine is started by theinlet of steam bymcans of pulley a2, gears A c', and shaft A, the centrifugal force of the balls D acting against the constant force of the spring It elevates the sleeve F, and through the crank H operates the valve-cylinder I to close or partially close the ports 7c, which shuts off a portion of the volum of steam, and the action of the engine is consequently reduced, and thisinterchange of power between the steam force and governor influence will continue until a proper medium is obtained.

It will readily be observed that by means of the nut fr the force ofthe spring R may be regulated at will; and hence, if a high rate of speed is desired, the said nut r may be screwed down until the centrifugal force will roo l not so completely overcome the spring force I of the spring R, and the ports Will necessarily admit more steam, while if a lovg rate of speed is desirable, the spring force of R will be reduced by elevating the nut i', allowing the centrifugal influence of the balls D to close the ports 7c more readily.

If desired, the balls D may be hung on horizontal bars or arms, and curved springs be arranged to resist the centrifugal force of the balls.

1. A steam-governor havin g a vertical revolving shaft, which receives its motion from the engine to which it is attached, combined with adjustable spring R, adapted to be adjusted upon the part a of the revolving shaft A, and to resist the centrifugal force imparted by said shaft, as set forth.

2. A steam-governor having a vertical re- 2o 3 The combination of the shaftA a and connecting-gears, the curved bar C, having rods c, the balls D, spring R, nut i, crank H, valve-cylinder I t', port-cylinder K 7c, and case L, having steam-inlet L', and outlet M, as and 3o for the purposes setforth.

In testimonyr whereof I afx my signature in presence of two Witnesses.

PARKER WELLS.

Witnesses:

H. CLAY SMITH, GEO. F. GRAHAM 

